Planer-knife jointer.



W. HARPER.

PLANER KNIFE JOINTER.

APPLICATION FILED SEPT. 1a, 1908.

L 1 9 1 0 3 y a M d w n .w a D...

L T E E H J S T E E H B 2 llllllllll' W HARPER PLANER KNIFE JGINTER.

APPLICATION FILED SBPT.18, 1903. 993,367.

1% W272 07; wa i/y m Patented May 30, 1911.

UNITED %TATE% PAENT FFIO.

WILLIAM HARPER, OF BELOIT, WISCONSIN, ASSIGNOE. TO THE BERLIN MACHINEWORKS, OF BELOI'l, WISCONSIN, A CORPORATION OF WISCONSIN.

IPLANER-KNIFE J OINTER.

Application filed September 18, 1908.

lo (ZZZ whom it may concern:

Be it known that 1, WILLIAM HARPER, a citizen .of the United States,residing at Beloit, in the county of Rock and State of Wisconsin, haveinvented certain new and useful Improvements in Planer-Knife Joint ers,of which the following is a specification.

Even though the knives of a planer cylinder are adjusted or positionedexactly parallel to the planer-platen when in planing or operativeposition and while the cylinder is stationary or rotating at a slowspeed, nevertheless the planer will ordinarily not perform or turn outentirely satisfactory work, because when the cylinder with its cuttingknives is rotated at the high speed of normal operation the cylinder andits shaft do not turn about the real axis of the shaft, but rather seeka center of their own varying slightly in position from the real shaftaxis, due probably to the impossibility of exactly balancing the cyinder. Ihis invention provides for the jointing of such planer-knives inexact parallelism with the platen surface while the knife-equippedcylinder is revolving at full speed, that is, while rotating underordinary working conditions. After being thus treated, the knives of theplaner are capable of producing lumber of exact and uniform thickness,the edges of all the knives being parallel to and at the same distancefrom the top horizontal surface of the platen.

On the accompanying drawings, which form a part of this specification, Ihave illustrated a preferred and desirable ointer embodying thisinvention, and in the various views like reference characters refer tothe same parts.

On the drawingsFigure 1 is a vertical section of a planer of the usualand ordinary construction equipped with one of my improved jointingmechanisms; Fig. 2 is a fragmentary side elevation of the centralportion of the planer shown in Fig. 1, certain parts being sectioned,and a portion of the yoke supporting the upper planer-head being brokenaway; Fig. 3 illustrates my jointer applied to another planer-head,indicating its capability of reversal without affecting the adjustmentof any of its parts; Fig. 4 is a face view of one of the supportingbrackets and studs adapted to hold the jointer-bar in place; Fig. 5 is asection on Specification of Letters Patent.

Patented May 30, 1911.

Serial No. 453,627.

a fragmentary portion of the yoke of the machine; Fig. 6 is a top planview of my improved double-ended or reversible'jointing device, showinga portion of its supporting bar; Fig. 7 is a front view of theconstruction illustrated in Fig. 6; Fig. 8 is a section on line 88 ofFig. 7, showing in addition a portion of the planer-head; and Figs. 9,10 and 11 are detail sections illustrating the manner of attaching theoperat ing rod to the jointer and of supporting the same.

Referring to the drawings, it will be noticed that the planer shown hasthe usual base or lower frame 20 on which is mounted the yoke 21carrying the upper planer cylinder 22, the shaft 23 of which is rotatale in suitable bearings 24, 24, the yoke and the cylinder carriedthereby being verticallyadjustable in parallel relation to the platen 25on the base or frame of the machine by means of a transverse shaft 26rotatable in a pair of bearings 27 on the bottom frame, and equipped ateach end with a bevel pinion 28, the teeth of which mesh with those ofanother bevel gear 29 on the lower end of an upright screw-shaft 30,revoluble at its lower end in a bearing 31 on the frame, and having athreaded connection at its upper end with a threaded lateral extensionor ear 32 on the side of the yoke. The shaft 26 at its opposite ends isalso angular or square in cross-section at 33 whereby to enable the sameto be turned by a wrench applied thereto. Obviously, as the shaft 26 isrotated, the yoke 21 and its cylinder and knives can be adjusted awayfrom or toward theworksupportin platen 25.

The construction so far described is-of the usual and ordinarycharacter, my present invention residing solely in the jointingmechanism described hereinafter.

On the lower portion or under surface of each of the legs of thesubstantial yoke 21, I fasten by means of bolts, screws, or othersuitable devices 34, a bracket 35 equipped with a forwardly-extendedpost or stud 36 having an integral collar 37 in front of the bracket andalso supplied with a beveled sliding washer or collar 38 pressed towardthe bracket by a coil spring 39, cooperating with which I employ a nut10 on the threaded end of the stud and adapted to regulate the pressureand action of the spring and washer.

A jointer-supporting bar 41, preferably rectangular in crosssection, isadapted to be temporarily applied to and supported by the pair of studs36, the bar having at one end a slot 42 and being equipped near itsother end with one or more right-angle slots 43, the extreme end of thebar being provided with a manipulating-handle 44 which facilitates theplacing of the bar on the studs and its removal therefrom. Slidable onthis bar I use a j ointer-supporting block or member 45, held fromvibrating on the bar 41 by an internal leaf-spring 46 bearing againstone face of the bar, the spring being received in a cavity or recess onthe inner face of a cover-plate 47 held to the sliding block or member45 by screws 48. The opposite face of this sliding block is suppliedwith a pair of parallel undercut grooves 49 and 50 receiving and guidingthe jointers 51 and 52, respectively, each equipped with a jointmgbar orbody 53 and 54, respectively, of emery or similar material, the blocksor bar 53 and 54- projecting from opposite sides of the sliding support45. To hold these blocks of emery in place small leaf-springs 55 areplaced at their sides within the jomters 51 and 52, the bearing of thesesprings on the blocks of emery being controlled by adjust able screws 56passing through the sides of the jointers. At one side of the jointer 51the member 45 is supplied with an outstanding ear 57 in a circularaperture of which a cylindrical portion of a screw 58 has a bearing, theother end of the screw engaging a screw-threaded hole in the lateralextension 59 projecting outwardly from the ointer 51. To facilitate theturning of this screw which is adapted to adjust the jointer 51transversely of the members 41 and 45, I provide the same with amanually-turned knurled head 60 which bears across the outer face of theear 57 and limits the sliding of the jointer 51, which movement isimpelled by a coil expansion spring 61 encircling the screw and bearingat its opposite ends against the inner face of the ear 57 and theadjacent face of the lateral extension 59. By turning this screw bymeans of its head 60 the position of the jointer 51 and jointerblock orbar of emery 53 may be readily regulated and adjusted, and at the sametime the jointer and its jointing body of emery 53 may yield toward thebar 41, that is, away from the planer knives on which it is adapted toact. Theother adjustable jointer 52 is supplied with a like butoppositely-arranged adjust-ing and yielding mechanism, and I havesupplied the parts thereof with the same reference characters which Ihave employed in connection with the parts of the adjusting deviceforthe jointer 51.

For sliding or moving the jointer supporting block or member 45 on itsbar 41, I provide the latter at one end with the oppositely-extendedpins 62 and 63, respectively, each equipped on its end with a circularundercut groove 64 adapted to receive and guide an actuating-rod 65cylindrical for the greater portion of its length and provided at itsend with a handle 66. The inner end of this rod 65 is bent downwardly orto one side at 67, and near this end the rod is flattened on oppositefaces to provide a portion 68 of reduced thickness and adapted to passthrough the restricted entrances of either of the undercut grooves 64.On its opposite faces the sliding block 45 has a pair of recesses orcavities 69 adapted to receive the bent end 67 of the operating rod 65,the adjacent cylindrical portion of the rod lying in a substantiallysemi-cylindrical groove 70 on the opposite faces of the sliding block 65and leading from its end to the holes or cavities 69. To preventdisplacement or disengagement of the bent end of the'rod with the block45, I provide adjacent to each hole 69 a swinging spring-retainer 71pivoted on a screw 72 and provided with an operating handle 7 3, thisspring being adapt ed to be swung around over the end of the rod tomaintain it in place, as is indicated in Fig. 9.

The operation of this improved jointer is practically as follows:Assuming that the knives of the planer head are sharp and have theiredges in exact parallelism when in planing position, with the topsurface of the platen, I place the jointer-supporting bar 41 on the pairof studs or posts 36 (as illustrated in Fig. 1) which it will beunderstood are at the same distance above the platen surface. When thusin place the slot 42 at one end of the bar co-acts with one of the studs36, while one of the right-angle slots 43 near the other end of the barreceives the other stud 36, the bar being held parallel to the platen,as will be readily understood. If the operating rod 65 is not alreadyattached to the sliding jointer support 45, the same is applied to thedevice by passing the part 68 of reduced cross-section into the slot 64through its restricted entrance on the top of the bar 41, the rod beingthen pushed longitudinally through the aperture 64 from which it isprevented from disengagement owing to the undercut character of thegroove or slot. The bent end 67 is placed in the hole 69 on the top ofthe block or sliding member 45, a spring-retainer 67 being swung overthe rod to hold it in place and prevent its dislodgment, as is indicatedin Fig. 9. The cylinder 22 equipped with the knives and its shaft 23 isthen revolved at full speed, during which action the operator, bygrasping the handle 66 of the connecting or operating rod 65, causes thejointer to slide on the bar 4C1, during which movement of the same oneof the blocks of emery 53 or 5% on the top of the same engages and wearsdown the edge of one or more of the cylinder knives, which during theirrotation approach the platen more than the remaining knives, whereby theedges of all the knives after the jointing has been accomplished willwhen they are in planing position be in exact parallelism with thehorizontal face of the platen when the cylinder is rotating at normalhigh speed. As will be readily understood, the block of emery can beadjusted toward and from the knives by manipulating or turning one ofthe adjusting screws 58 by means of its knurled head 60.

If it is desired to joint the edges of the knives of another planercylinder, either an other upper cylinder or a lower cylinder, the bar l1can be applied to the studs 36 of this second machine, which studs arepreferably a different distance apart from those of the first machine,as is indicated in Figs. 1 and 3, so that another one of the right-angleslots will be employed, the bar 41 being reversed so as to bring theother or opposite jointer on the top side of the bar, this jointer beingthe one which can now be used on the second upper cylinder to put theedges of its knives in condition. If the jointing mechanism is to beused for a lower cylinder this reversal of the bar may not be necessary,but in any case a difierent jointer and its block of emery would beemployed for the second cylinder so as not to disturb the adjustment ofthe jointer which had been previously used in connection with the firstcylinder. Owing to the factthat the studs are different distances aparton the two machines or the two parts of the machine, it is impossible toapply the bar thereto in such a manner that the jointer used with thefirst cylinder could be employed to act upon the edges of the second.The two jointers mounted on the same sliding member are, therefore,independently adjustable and adapted to joint the edges of the knives ofdifferent cylinders. Of course, it would not be absolutely necessary todetach and again connect the operating rod 65 to the sliding block 45whenever the jointing mechanism is reversed, though it would doubtlessbe preferable to do so.

My invention not being limited to the exact features of constructionherein set forth in detail, it will be readily understood that thejointing mechanism illustrated and described may be considerablymodified without departure from the substance and essence of theinvention.

I claim- 1. In a planer, the combination of a frame, a platen, acylinder-support adjustable toward and from said platen in parallelrelation thereto, a planer-cylinder equipped with knives mounted on saidcylinder-support, a j ointer-support adapted to be mounted on saidcylinder-support, and a jointer movable on said jointer-support andcapable during rotation of the cylinder and the knives of jointing theedges of said knives in parallelism with the surface of the platen whilesuch knives are in that portion of their rotation in which they meet thework, substantially as described.

2. In a planer, the combination of a frame, a platen, a cylinder-supportadjustable to ward and from said platen in parallel relation thereto, aplaner-cylinder equipped with knives mounted on said cylinder-support, apair of studs on said cylinder-sup port, a supporting bar detachablymounted on said studs, and a j ointer slidable on said barlongitudinally of said knives and capable during rotation of thecylinder of ointing the edges of said knives in parallelism with thesurface of the platen during that portion of the rotation of such knivesin which they meet the work, substantially as described.

3. In a planer, the combination of a frame, a platen, a cylinder-supportadjustable toward and from said platen in parallel re lation thereto, aplaner-cylinder equipped with knives mounted on said cylinder-support, aslotted bar detachably mounted on such studs, and a jointer slidable onsaid bar longitudinally of said knives and capable during rotation ofsaid cylinder of jointing the edges of said knives in parallelism withthe surface of the platen while the knives are in that portion of theirrotation in which they meet the work, substantially as described.

4. In a reversible tool for acting on the edges of knives ofplaner-cylinders during rotation of such knives, the combination of asupport equipped with different means for attaching the same to planerframes in position for action on the knives of differentplaner-cylinders, and a double-ended tool movable on said support andadapted to joint the edges of the knives during their rotation and inthat portion of their rotation in which they meet the work,substantially as described.

5. In a reversible tool for acting on the edges of knives ofplaner-cylinders, the combination of a slotted bar, the slots of whichare adapted to receive studs and be supported thereby, different slotsbeing used when the bar is mounted for action on different cylinders,and a double-ended tool slidable on said bar and adapted to joint theedges of the cylinder knives during their rotation and in that portionof their rotation in which they meet the work, substantially asdescribed.

6. In a reversible jointer, the combination of a jointer-support havingdifferent means for attaching the same to planer frames' 'port andadapted and capable of jointing the edges of said knives during theirrotation and in that portion of such rotation in Which they meet theirWork substantially as described.

7 In a reversible jointer, the combination of a jointer-support havingdifferent means for attaching the same to planer frames in proximity todifferent cylinders, a doubleended jointer slidable on said support, and

inder during rotation "of the latter and While in that portion of itsrotation in Which they meet the Work, substantially as described.

WVILLIAIVI HARPER.

Witnesses:

EARL L. KARsTAEDT, T. M. RANDALL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G.

